It's part of the unpredictable nature of investing, gulley. No one truly knows where it is heading. Fundamentals are dependent on NVTL's success turning profitable and harnessing the promise of MiFi and M2M. These markets are huge. The balance sheet is also relatively strong with good liquidity. Technicals are mixed but leaning bullish. On one hand, the RSI has shot back up to near overbought range at 67 (although it's proven it can remain in overbought range for a long time). On the other, NVTL made a strong bounce off its 50 DMA and MACD lines/signals have turned positive. It may run a while longer I'm guessing.
NVTL is no longer the monster bargain it once was but it still has great potential. Don't overlook the potential for it being acquired. Rather than chase it, you might consider waiting for a pullback if you can't do without it. For my part I have a large enough core position to just sit and watch. Good luck.